Yes, my Commndo has number 312091. So one washer is right. Thanks for the information. In my manual and also in the Haynes they only talk about later than 200000.

I found this post from Dave Comeau which confirms my reading of 0.030". In this post they also say, that the tabbed washers should be avoided.
http://www.britbike.com/forums/ubbthreads.php?ubb=showflat&Number=69240#Post69240

Originally Posted by Dave Comeau

..... and the cases and thrust washers are normally 1.105" total giving .030" end float/clearance.


Regards,
Ralf


Triumph Bonneville 650 T120RV 1972
Norton Commando 850 MKII 1973